(+)-8-Phenylmenthol → (1R,2S,5R)-5-methyl-2-(1-methyl-1-phenylethyl)cyclohexyl 5-(3-bromo-4-fluorophenyl)-4,6-dioxo-1,3,4,5,6,7,8,9-octahydro-2H-cyclopenta[b][1,7]naphthyridine-2-carboxylate

HRID 635972

Reaction equation

HRID 635972 reaction equation
C([N:8]1[CH2:17][C:16]2[NH:15][C:14]3[CH2:18][CH2:19][C:20](=[O:21])[C:13]=3[CH:12]([C:22]3[CH:27]=[CH:26][C:25]([F:28])=[C:24]([Br:29])[CH:23]=3)[C:11]=2[C:10](=[O:30])[CH2:9]1)C1C=CC=CC=1.Cl[C:32]([O:34][CH:35]1[CH:40]([C:41]([C:44]2[CH:49]=[CH:48][CH:47]=[CH:46][CH:45]=2)([CH3:43])[CH3:42])[CH2:39][CH2:38][CH:37]([CH3:50])[CH2:36]1)=[O:33].C1(C(C)(C)C2CCC(C)CC2O)C=CC=CC=1>C1COCC1>[Br:29][C:24]1[CH:23]=[C:22]([CH:12]2[C:11]3[C:10](=[O:30])[CH2:9][N:8]([C:32]([O:34][C@@H:35]4[CH2:36][C@H:37]([CH3:50])[CH2:38][CH2:39][C@H:40]4[C:41]([CH3:42])([C:44]4[CH:49]=[CH:48][CH:47]=[CH:46][CH:45]=4)[CH3:43])=[O:33])[CH2:17][C:16]=3[NH:15][C:14]3[CH2:18][CH2:19][C:20](=[O:21])[C:13]2=3)[CH:27]=[CH:26][C:25]=1[F:28]

Participants

5

Reactant 3

HCID 577105(+)-8-PhenylmentholHCID 113288132-benzyl-5-(3-bromo-4-fluorophenyl)-2,3,5,7,8,9-hexahydro-1H-cyclopenta[b][1,7]naphthyridine-4,6-dioneHCID 145714908-Phenylmenthol chloroformate

Product 1

HCID 69302932(1R,2S,5R)-5-methyl-2-(1-methyl-1-phenylethyl)cyclohexyl 5-(3-bromo-4-fluorophenyl)-4,6-dioxo-1,3,4,5,6,7,8,9-octahydro-2H-cyclopenta[b][1,7]naphthyridine-2-carboxylate

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent2×

Procedure

A solution of the product from Example 5A (1.9 g, 4.0 mmol) in THF (30 mL) was treated with 8-phenylmenthol chloroformate prepared from (−)-8-phenylmenthol as described in (Yamamoto, Y., J. Amer. Chem. Soc. (1992), 114, 121-125) (1.45 g, 4.92 mmol) in THF (10 mL), stirred for 3 days at ambient temperature and partitioned between aqueous sodium bicarbonate and methylene chloride. The organic layer as separated, dried with sodium sulfate, filtered and concentrated to provide a mixture of diasteromeric carbamates. The diastereomeric mixture was subjected to column chromatography over silica gel (20% hexanes/ethyl acetate) to provide the title compound (0.32 g) as the less polar diastereomer and mixed fractions containing both diastereomers (0.9 g).

Workup

  1. custompartitioned between aqueous sodium bicarbonate and methylene chloride
  2. customThe organic layer as separated
  3. dry with materialdried with sodium sulfate
  4. filtrationfiltered
  5. concentrationconcentrated
  6. customto provide

Sources & evidence

ORD record
ord-e8bad3f1e574425595185bd61ad8a829
Source dataset
uspto-grants-2001_02
Patent number
US06191140B1

Linked notes

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